Planetary transmission mechanism



June 25, 1935. O. BANKER 2,005,726

PLANETARY TRANSMISSION MECHANISM Filed June 29, 1953 3 Sheets-Sheet l INVENTOR 9"ww;&

ATTORNEY5 June 25, 1935. 0; BANKER PLANETARY TRANSMISSION MECHANISM 3 Sheets-Sheet 2 QM fl 69/ INVENTO Filed June 29, 1933 014% P 71mg ATTORNEYS June 25, 1935. o. H. BANKER PLANETARY TRANSMISSION MECHANISM .5 Sheets-Sheet 3 Filed June 29, 1933 INVENTOR BY M r M ATTORN EYS Patented June 25, 1935 ILANETARY TRANSMISSION Oscar H. Banker, Chicago, 111., or to New Products Corporation, Chicago, 111., a corpora- 4 tion of Illinois Application June 29, 933; Serial No. 678,122

1 Claim. (01. 74-211) The invention relates to transmission mechanisms. 4

The object of the invention is to provide a transmission mechanism of the planetary gear type adapted to provide three forward speeds and a reverse of simple construction and particularly adapted for heavy duty service.

The invention further consists in the several features hereinafter set forth and more particularly defined by the claim at the conclusion hereof.

In the drawings:

Fig. 1 is a vertical sectional view of a transmission mechanism embodying the invention, parts of the interior mechanism being shown half in full and half in section;

Fig. 2 is a side elevation view of the transmission mechanism, parts of the casing being broken away and parts being shown in section;

line 33 of Fig. 1.

In the drawings, the numeral 5 designates the casing, 6, 1 and 8 bearings mounted in said casing for supporting the shafts and the change speed gearing. The drive shaft 9 is mounted in the bearing 6 and also in an auxiliary roller bearing l0 and its inner end is formed to provide a long toothed clutch element l l and a bearing recess l2.

The driven shaft I3 is mounted in the bearing 8 and is provided with a bearing recess I4.

A transmission shaft l5 has one end joumalled in roller bearings l 6 in the recess l2 and the other end journalled in sets of roller bearings l1 and II in the recess l4.

A sleeve shaft I8 is mounted to turn freely on roller bearings l9 and 20 and has a gear 2| secured to it or formed integral with it.

A gear 22 is formed integral with or secured to the shaft IS.

A gear 23 is keyed to the driven shaft l3.

The gears 2|, 22 and 23 form sun gears of a planetary gearing and mesh respectively with sets of planet gears 24, 25 and 26. Each set of gears 24, 25, and 26 'is preferably formed as a compound gear having shaft portions 21 journalled in roller bearings 28 in the parts 29 and 30 of the planetary gear carrier. The hub of thepart 29 of said carrier is journalled in a roller bearing 3| mounted in the casing Sand journalled on the roller bearings 32 surrounding the shaft 9. The

, hub of the part 30 of said carrier is journalled in the ball bearing 1 and on roller bearings 33 surrounding the sleeve shaft I8.

The parts 29 and 30 of the planetary carrier Fig. 3 is a detail-sectional view taken on the .are suitably secured together and to the web with the drum 35 to hold it and the carrier stationary while similar brake members 39 are adapted to be engaged with the drum 31 to hold the shaft l8 stationary.

As shown in detail in Fig. 3 the brake members 38 are in the form of semi-circular bands or shoes pivotally mounted at one end on a .pin 40 secured to a supporting link 4| and normally heldin a release position by springs 42 which are maintained under a predetermined amount of tension by rods 43 anchored at one of their ends 44 in one of the shoes and extending through said springs and guide openings in the other of said shoes and provided with threaded ends carrying tension adjustingnuts 45 which in the construction shown engage a block 46 interposed between said nuts and the upper shoe; This block 46 forms the pivotal support for a brake operating eccentric or cam member 41 secured to a pivot pin 48 supported in a lug 49 in said block.

The brake members 39 while not shown in detail are pivotally supported at one end in a man-- ner similar to the members 38 and are held in a release position by springs 42* and rods 43' which are similar to the springs 42 and rods 43 previous- 30 ly described, the rods carrying nuts 45' which engage a block 46', similar to the block 46, and forming a pivotal support for the brake operat ing cam member 41' secured to a pivot pin 48 supported ina lug 49, in said block.

The cam members 41 and 41' are designed to operate in opposite directions so that when one brake is applied the other is in released position.

For operating the. cam members 41 and 41, which are in the form of levers, said members have their long arms operatively connected by links 50 with a collar 5| secured to a shift rod 52 slidably mounted in bores 53 in the casing and connected by a link 54 with the intermediate portion of an operating lever 55 pivotally supported at 56.

A jaw clutch member 51 having clutch teeth alined with those of element II is secured to the shaft l5 and a similar clutch member 58 is keyed to the sleeve shaft I8.

A shiftable jaw clutch element 59 has teeth 60 adapted to slidably engage those of the ele- 'ment II and teeth 6| adapted to engage either l3rake members 38 are adapted to be engaged 5 For shifting the element 59, the same is provided with an annular groove 62 in which the forked ends of a shifter fork 63 are operatively mounted, said fork secured to a shaft 64 pivotally mounted in the casing 5 and carrying an operating lever 65. I

With the above described construction, when the clutch element 59 is moved to bring the teeth 6| into engagement with those of the clutch member 51 and the brake members 38 are applied to the drum then the shaft I5 is driven through said clutch connection from the shaft 9 and the gear 22 drives the planet gears 25 and 26 which gears 26 turn the gear 23 and hence the driven shaft l3 at low speed. For second speed, the clutch element 59 is moved to bring the teeth 6| into engagement with the teeth of the clutch member 58 and the brake members 98 are applied to the drum 35 then the sleeve shaft I8 is driven through said clutch connection from the shaft 9 and the gear 2| drives the planet gears 24 and 26 which gears 26 turn the gear 23 and hence the driven shaft 1 3 at second speed. With both brake elements free and the clutch element 59 shifted so that the teeth mesh with both clutch elements II and 51 and its teeth 6| mesh with the clutch element 58 then the shafts 9, I5 and I8 are locked together and consequently the gears of v the planetary gearing are locked together and by the gears 22 and 25 rotate around the fixed gear 2| and through the gears 26 meshing with the gear 23 drive the shaft l3 in a counterclockwise or reverse direction.

It is to be noted that the movements of the clutch element 59 to its different positions is accomplished through the movement of the lever and the application and release of the brake members is under the control of the lever 55.

I desire it to be understood that this invention is not to be limited to any particular form or arrangements of parts except in so far as such limitations are included in the claim.

What I claim as my invention is:

In a change speed gear mechanism, the combination of a drive shaft, a pair of transmission drive shafts, a driven shaft, change speed planetary gearing between said transmission shafts and said driven shaft including sun gears on each of said shafts, a planetary gear carrier and planet gears on said carrier meshing with said sun gears, a brake drum connected to said carrier, a brake band engageable with said drum for holding said carrier against movement in low and second speed drive, a lever provided with a cam for applying said band, a brake drum on one of said transmission drive shafts, a brake band engageable with said last named drum for holding said shaft against movement in reverse, a lever provided with a cam for applying said last named band, a single lever operatively connected to and controlling both of said bands independently and clutch mechanism for selectively connecting said drive shafts with said transmission.

OSCAR H. BANKER. 

